Zombies, Run!

Zombies, Run!

For: iOS, Android

Any running app can give you a goal to run toward. Few can give you a threat to run from—which for some of us is more motivating. Immerse yourself in the world of Zombies, Run!, which turns your running route into a post-apocalyptic wasteland filled with fast zombies out to eat your flesh. Players collect supplies as they run while listening to the storyline through their headphones. Or, they can enter zombie chase mode, in which they must run faster for small bursts during their run or risk being caught by the undead. The app includes options for sprinting when a horde is bound to overwhelm you.

GymShamer

GymShamer

For: iOS, Android

If you're the type who's hard-pressed to get to the gym, maybe you need a fitness app with a little negative reinforcement—for instance, public shaming. GymShamer integrates itself with your FourSquare account and lets you set a fitness goal for the week. And if you don't check into the gym the number of times set by your goal, it lets all your friends and Twitter followers know you're slacking off and encourages them to shame you.